Intense double rainbow arcing over Doe Castle and the sands of Sheephaven Bay in Donegal on Ireland's Wild Atlantic Way.

Doe Castle dates to the 1420s and was home of the McSweeneys, a clan originally from Scotland who came to Ireland as mercenary fighters known as gallowglasses.

The name Doe Castle is an anglicisation of Caisleán na dTuath which means castle of the area or district - a túath being an administrative area in Gaelic Ireland.

The tower itself is 15th century but the outer enclosing walls, the bawn, date to the 17th century.

A recent journey took me to north Tipperary and the town of Nenagh.

It's a fine, large town, though not the largest in Tipperary, that accolade goes to Clonmel in the south of the county.

Nenagh has a distinctive castle, or at least a tower - remains of the much larger original built around the year 1200 by the local Theobald FitzWalter, Baron Butler, whose descendents would become the Earls of Ormond and was constructed of limestone rubble.

It is tall, at around 25 metres, with additions built in the 1860s - the crenellations at the top.

Seen here on a bright spring day in this panorama with some of the walls of the original castle.

I discovered that Nenagh Castle is free to visit, and while visiting the town's tourist office I was informed that the local library, as well as the other libraries in Tipperary, also host free events and exhibitions throughout the year.

So I went for a coffee at the nearby Steeples cafe then headed to the library.

Irish jeweller and designer / maker Christina Keogh has an exhibition on in the library of beautiful silversmithing, gold and gemstones as well as traditional goldsmithing tools and will give a talk on Tuesday 18th of April in Nenagh Library.

Carrickfergus Castle was begun by John de Courcy in 1177.

De Courcy was an Anglo-Norman knight who came to Ireland at the behest of Dermot MacMurrough, King of Leinster, who sought the English King Henry II's help in becoming King of Ireland.

With no inheritance in England due, no lands and title - de Courcy set off from the southeast of Ireland to the north, and effectively defeated any opposition in County Down and County Antrim. Thus begins a turbulent millennium of English involvement in Ireland.

Situated in the corner of County Tyrone, Northern Ireland's largest county, the remains of Harry Avery's castle sit atop a hill on the edge of a valley.

The twin structures projecting up here were actually an unusual tower house rather than an outer defensive gatehouse.

Belonging to a 14th century Irish chieftain it was destroyed in the early 17th century by English forces who took stone from the site.

This scene reminded me of another castle, more famous, from my own County Antrim which I also photographed with a cow in front: https://panoramicireland.com/photo-tours-blog/cow-in-front-of-dunluce-castle-causeway-coast-antrim-northern-ireland

A recent photography tour took me back to County Cork and after finishing, since it was such a fine day, I went exploring in the Irish countryside.

Here I found Barrymore Castle in the north of County Cork, ruined since the 1770s it was built in the 1620s and was once a majestic home. 

Now it is only ruins and ivy, standing on a bluff overlooking a small river. Unlike many of the ruins dotting the Irish countryside this one was not destroyed in some war or conflict but in a conflagration that some say lasted for months, during repairs to the roof.

See my exploration of Barrymore Castle below on Panoramic Ireland's YouTube channel.